English

Electromagnetic Decay of the $\Sigma^{0}(1385)$ to $\Lambda\gamma$

Nuclear Experiment 2011-05-10 v1 High Energy Physics - Experiment

Abstract

The electromagnetic decay Σ0(1385)Λγ\Sigma^0(1385) \to \Lambda \gamma was studied using the CLAS detector at the Thomas Jefferson National Accelerator Facility. A real photon beam with a maximum energy of 3.8 GeV was incident on a proton target, producing an exclusive final state of K+Σ0K^+\Sigma^{*0}. We report the decay widths ratio Σ0(1385)Λγ\Sigma^0(1385) \to \Lambda\gamma/ Σ0(1385)Λπ0\Sigma^0(1385) \to \Lambda\pi^0 = 1.42±0.12(stat)0.07+0.11(sys)1.42 \pm 0.12(\text{stat})_{-0.07}^{+0.11}(\text{sys})%. This ratio is larger than most theoretical predictions by factors ranging from 1.5-3, but is consistent with the only other experimental measurement. From the reported ratio we calculate the partial width and electromagnetic transition magnetic moment for Σ0(1385)Λγ\Sigma^0(1385) \to \Lambda\gamma.

Keywords

Cite

@article{arxiv.1103.5701,
  title  = {Electromagnetic Decay of the $\Sigma^{0}(1385)$ to $\Lambda\gamma$},
  author = {D. Keller and K. Hicks and CLAS Collaboration},
  journal= {arXiv preprint arXiv:1103.5701},
  year   = {2011}
}